Suppression of standing spin waves in low-dimensional ferromagnets.
Suppression of standing spin waves in low-dimensional ferromagnets.
复制标题
低维铁磁体中自旋驻波的抑制。
DOI：
10.1103/physrevlett.107.037202
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发表时间：
2011
影响因子：
8.6
通讯作者：
O. Eriksson
中科院分区：
文献类型：
--
作者：
A. Taroni;A. Bergman;L. Bergqvist;J. Hellsvik;O. Eriksson
通过原子自旋动力学模拟，我们研究了磁性薄膜中驻留自旋波模的实验缺失现象。以Co在Cu(001)面上作为模型体系，我们证明了随着层数的增加，绝热第一性原理计算所预测的光学分支被强烈地抑制，这与文献中报道的自旋极化电子能量损失谱的测量结果一致。我们的结果表明，对Heisenberg模型进行动力学分析就足以捕捉到驻留模的强阻尼。
We examine the experimental absence of standing spin wave modes in thin magnetic films, by means of atomistic spin dynamics simulations. Using Co on Cu(001) as a model system, we demonstrate that by increasing the number of layers, the optical branches predicted from adiabatic first-principles calculations are strongly suppressed, in agreement with spin-polarized electron energy loss spectroscopy measurements reported in the literature. Our results suggest that a dynamical analysis of the Heisenberg model is sufficient in order to capture the strong damping of the standing modes.